Apple continuing work on 'hybrid' displays mixing OLED & quantum-dot LED

Perhaps reflecting a desire to maximize power efficiency in all areas, a newly-published Apple patent application showcases a "hybrid" display mixing OLED and quantum-dot LEDs. The U.S. filing, no. 20,190,131,356, describes a "tandem hybrid pixel" with an OLED subpixel and a quantum dot subpixel, plus various needed transport layers and cathodes. Quantum Dots are photoluminescent particles included in an LED-backed TFT display that can produce brighter and more vibrant colors, with the colors produced depending on their size. While available in current QLED televisions, the technology is only really being used to enhance the backlight, rather than being used to illuminate individual pixels.